DINGDINGDINGDING!!!! May 2025 First Month In NOAA Records Over 430 ppm Atmospheric Carbon Dioxide!! This Is Exciting!!

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9. The Keeling curve of CO2 taken from these observations is strong indicator of climate cgange

Annual fluctuation in CO2 follow a sinusoidal pattern. They maximize at the beginning of spring and then begin to decrease as plants become active and convert more CO2 into glucose during photosynthesis. The trough of the curve generally occurs in fall around September when many plants in northern hemisphere become dormant.

The long-term trend is that sinusoidal curve is going up every year. So the slope of the line through May each year show much more CO2 is in the atmosphere which will lead to more global warming as a greenhouse gas.

That's the simple explanation.